Pipe-wrench.



G. B. VISNESS.

PIPE WRENCH.

APPLICATION FILED MAY 3, 1912.

1 ,042, 1 75, Patent ed 0011.22, 1912.

9 /2 Ni T J LT 6Y5 Wmws, q vi h mooeo COLUMBIA PLANOGRAPHCO.,WASH1NOTDN. D. c.

CARL B. VISNESS, OF MEKINOCK, NORTH DAKOTA.

PIPE-WRENCH.

Specification of Letters Patent.

Patented Oct. 22, 1912.

Application filed May 3, 1912. Serial No. 694,850.

To all whom it may concern:

Be it known that I, CARL B. Vrsnnss, a citizen of the United States,residing at Mekinock, in the county of Grand Forks and State of NorthDakota, have invented new and useful Improvements in Piperenches, ofwhich the following is a specification.

This invention relates to pipe wrenches, the object in view being toprovide a device of the character specified which will automaticallygrip a pipe or other object between the jaws thereof, and alsoautomatically release its grip on such device, when the wrench is movedin an opposite direc tion.

A further object of the invention is to provide means, whereby thedistance between the jaws may be primarily regulated, so as toaccommodate the device, as a whole, to pipes, rods, or other objects ofdifferent sizes.

With these and other objects in View, the invention consists in theconstruction, combination and arrangement of parts, as will behereinafter more fully described, illustrated in the accompanyingdrawings, and pointed out in the claims hereunto appended.

In the accompanying drawings: Figure 1 is a side elevation of a pipewrench, embodying the present invention. Fig. 2 is a cross sectionalview through the same on the line 2-2 of Fig. 1. Fig. 3 is a plan viewof the main shank. Fig. 4 is a detail view of the spring. 5 is a detailperspective view of the link. Fig. 6 is a detail perspective view of thespring block.

The pipe wrench contemplated in this invention comprises essentially ahandle 1, a main shank 2, a pivoted secondary shank 3, jaws 4 and 5, anda link 6.

The handle 1 may be of any suitable length, according to the use forwhich the wrench is designed. The main shank 2 is pivotally connected atone extremity, at the point 7, to the end of the handle 1. and has thejaw 4 fixedly connected thereto, as shown at 8. The jaw 4 is angular orconsists of two parts extending substantially at right angles to eachother, and provided on their inner faces with teeth or serrations 9 forbetter gripping the pipe or other object to be operated upon. The jaw 5is fixedly connected, at 10, to the outer end of the pivoted shank 3.

The main shank 2 is provided with. a longitudinal slot 11 having at oneside thereof notches or offsets 12 adapted to receive a fulcrum pin 13carried by the pivoted shank 3. l Vhile the main shank 2 is preferablyformed in one piece, the pivoted shank 3 is formed of two parallel bars,as shown, which straddle or embrace the single or main shank 2 and carrythe pin 13, thereby enabling said pin to be moved into any one of thenotches or offsets 12 of the slot 11.

In order to hold the pin 13 in the selected notch 12, a spring 14 isarranged at the outer side of the main shank 2, said spring embodying acoil 15 and arms projecting therefrom, one of which is connected to thejaw 5, while the other arm is connected to a sliding block 15 extendingthrough the shank 3 and having T-shaped ends to retain it in place. Atits rear end, the pivoted shank 3 is connected by the link 6 to thehandle 1, said link being pivotally connected at its opposite ends tosaid members, as shown at the points 16 and 17.

The link 6 is made up, as shown in Fig. 5, wherein it is seen tocomprise two relatively slidable and overlapping members 18 and 19, themember 19 being provided with inwardly extending undercut or dove-tailedflanges 20, while the member 18 is dovetailed in cross section, so as toslide easily between the two flanges. The screw 21 connects the twomembers under any relative adjustment thereof, and in this way the linkas a whole may be extended or contracted in length to adjust therelative dis tance between the aws of the wrench. The spring block 15passes through the shank 3 and is provided with T-shaped ends, as shownin Fig. 6, to prevent the displacement of said block as it slidesagainst the shank 2.

It will now be understood that as the handle 1 is swung in onedirection, the jaws of the wrench are caused. to move toward each other,thereby gripping the pipe or other object between them. When the bandle1 is swung in the opposite direction, the jaws are moved away from eachother, thereby releasing their hold on the object. The wrench isautomatic both in its gripping and releasing action.

What is claimed is:

1. A wrench of the class set forth, comprising a handle, a stationaryjaw, a main shank connecting said jaw with the handle and provided wit-ha bayonet slot, embodying a plurality of fulcrum shoulders, a pivotedshank, a movable jaw thereon, a link connecting the pivoted shank withthe handle, a fulcrum pin on the pivoted shank adjustable in the bayonetslot, and a spring for retaining the fulcrum pin in engagement with anyone of said shoulders.

2. A wrench of the class set forth, comprising a handle, a stationaryjaw, a main shank connecting said jaw with the handle and provided witha bayonet slot, embodying a plurality of fulcrum shoulders, a pivotedshank, a movable j aw thereon, a longitudinally extensible linkconnecting the pivoted shank with the handle, a fulcrum pin on thepivoted shank adjustable in the bayonet slot, and a spring for retainingthe fulcrum pin in engagement with any one of said shoulders.-

In testimony whereof I affix my signature in presence of two Witnesses.

CARL B. VISNESS.

WVitnesses W. I. Forums, RAY K. HAMILTON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). C.

